Fuzzy logic for compound propositions.

Yamashita, Toshiyuki; Yamashita, Kiyomi

doi:10.4992/jjpsy.60.312

“…No change was observed in the amount of (3). The results indicate that the dialkylated product (5) is formed via the C-monoalkylindolylmetal salt (8), formed by the metallation of the N H of (4), and that (5) is not produced directly from the Nalkyl product (3). As shown in Schemes 1 and 2, the C-alkylated product (4) is directly produced upon alkylation of (1).…”

Section: Discussionmentioning

confidence: 99%

Regioselectivity control in alkylation reactions of indolyl ambident anion

Nunomoto¹,

Kawakami²,

Yamashita³

et al. 1990

J. Chem. Soc., Perkin Trans. 1

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ku, Nag0 ya 464- 01, JapanThe regioselectivity of Nand C-3( p) -alkylations of indolylmetal salts was studied under various conditions. The effect of counter metal ion is crucial in determining the regioselectivity. In tetrahydrofuran, exclusive N-alkylation occurred with the potassium salt, but the extent of C-3-alkylation increased with the sodium and lithium salts and became predominant with the magnesium bromide salt. However, N-alkylation was favoured generally in more polar solvents and for alkyl toluene-psulphonates it was favoured even with magnesium bromide salts. The reactivity and regioselectivity of the alkylations were correlated with the calculated electron density of the indolyl anion and with I3C n.m.r. chemical shifts of the metal salts.

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Fuzzy Logical Approach to Perception of Dot Numerosity

Yamashita

¹

1989

Percept Mot Skills

0

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The present study utilized a fuzzy logical approach for understanding human perception or judgments of dot numerosity. In Exp. 1 subjects were required to view dot patterns and to judge the truthfulness of the single and combined statements which asserted that the number of dots was large. The results indicated that (a) the rules based on the minimum and maximum truthfulness of the component statements best approximate subjective conjunction and disjunction about dot numerosity, when subjects kept the operations of the standard logic system in mind. (b) When the subjects based their judgments on perceptive impression, their judgments were best fitted by the multiplicative form.

show abstract

Fuzzy Logical Approach to Perception of Dot Numerosity

Yamashita

¹

1989

Percept Mot Skills

0

View full text Add to dashboard Cite

The present study utilized a fuzzy logical approach for understanding human perception or judgments of dot numerosity. In Exp. 1 subjects were required to view dot patterns and to judge the truthfulness of the single and combined statements which asserted that the number of dots was large. The results indicated that (a) the rules based on the minimum and maximum truthfulness of the component statements best approximate subjective conjunction and disjunction about dot numerosity, when subjects kept the operations of the standard logic system in mind. (b) When the subjects based their judgments on perceptive impression, their judgments were best fitted by the multiplicative form.

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Fuzzy logic for compound propositions.

Cited by 3 publications

References 0 publications

Regioselectivity control in alkylation reactions of indolyl ambident anion

Regioselectivity control in alkylation reactions of indolyl ambident anion

Fuzzy Logical Approach to Perception of Dot Numerosity

Fuzzy Logical Approach to Perception of Dot Numerosity

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